Mediated self-assembly of host-guest nano copper cyanide and 1,7-diaminoheptane: Design, catalytic and biological evaluation

•3D-host-guest supramolecular coordination polymer (SCP1); ∞3[(Cu3(CN)3)2.(DAHP)], was synthesized by self-assembly method under ultrasonic radiation.•Structure consists of new two-fold [Cu3(CN)3]2 fragments containing tetrahedral copper(I) atoms which are arranged in unique way to create 3D-structure containing DAHP as guest molecule.•The nano-system exhibits excellent catalytic activity towards mineralization of methyl violet, methylene blue and indigo carmine dyes using H2O2 as oxidant within very short time.•The activity against some human cancer cell lines, antimicrobial activity, and antioxidant activities have been evaluated.